<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <!-- 驼峰命名 -->
    <div class="navWrap">

    </div>
    <!-- 划线 -->
    <!-- 中划线 -->
    <div class="nav-wrap">

    </div>
    <!-- 下划线 -->
    <div class="nav_wrap">

    </div>
    <!-- !!!!统一使用中划线命名法 html中 -->
    <script>
        var arr = [{
            "name": "huangwei",
            "age": 18
        },
        {
            "name": "xiaofang",
            "age": 17
        }
        ]
    </script>
</body>

</html>